Decorative thermosetting laminate such as floor headings, work tops, desk tops and wall panels comprises an upper decorative layer and a carrying core

摘要

The decorative thermosetting laminate such as floor headings, work tops, desk tops and wall panels comprises an upper decorative layer (2) and a carrying core (3). The laminate has a conductivity of 500 komega cm. Upper side of the core is provided with the decorative layer and a lower side (4) of the core is provided with balance layer (5) having a polymer and cellulose. The balance layer has a low density area of 30-300 kg/m 3, high density area of = 1100 kg/m 3. A predetermined area portion of the balance layer is compressed so that the density is increased by a factor =1.3. The decorative thermosetting laminate such as floor headings, work tops, desk tops and wall panels comprises an upper decorative layer (2) and a carrying core (3). The laminate has a conductivity of 500 komega cm. Upper side of the core is provided with the decorative layer and a lower side (4) of the core is provided with a balance layer (5) having a polymer and cellulose. The balance layer has a low density area of 30-300 kg/m 3, high density area of = 1100 kg/m 3. A predetermined area portion of the balance layer is compressed so that the density is increased by a factor =1.3. The balance layer and the carrying core are joined with each other by a pressing unit. The laminate is cut into panels and provided with edges intended for joining. The decorative layer is constituted by decor papers impregnated with thermosetting resin and overlay sheets impregnated with thermo setting resin arranged on top of the decor papers and thermosetting resin impregnated underlay papers arranged under the decor paper or decor papers, which papers are laminated together under increased pressure and temperature. The carrying core is constituted by a particle board, a fiber cement board, an oriented strand board, and is the board based on polyurethane. The sheets are impregnated with outermost thermosetting resin, and provided with hard particles of silicon oxide, aluminum oxide and/or silicon carbide with a size of 5-60 mu m. The thermosetting laminate has a thickness of 0.15-1.2 mm and a density of 1250-1500 kg/m 3. The balance layer has a thickness of 0.5-3 mm. The balance layer and/or the decorative laminate are joined with the carrying core by unit of melt-glue, heat and pressure. The glue comprises a conductive material. The conductive material is constituted of carbon black and carbon fiber. The low density area and high density area forms pattern on the balance layer. The low density areas represent 50% of the area of the balance layer. The pattern is parallel lines, triangles, squares, rectangles, hexagons, octagons, circles and/or random lines.